package com.xunqi.blog.web.admin;

import com.xunqi.blog.pojo.Type;
import com.xunqi.blog.service.TypeService;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.annotation.Resource;
import javax.validation.Valid;

@Controller
@RequestMapping(value = "/admin")
public class TypeController {

    @Resource
    private TypeService typeService;

    @GetMapping("/types")
    public String types(@PageableDefault(size = 3,sort = {"id"},direction = Sort.Direction.DESC)
                                    Pageable pageable, Model model) {

        Page<Type> page = typeService.listType(pageable);
        model.addAttribute("page",page);
        return "admin/types";
    }


    @GetMapping(value = "/types/input")
    public String input(Model model){
        //跳转到新增页面去传一个type值过去，避免前端报错
        model.addAttribute("type",new Type());
        return "admin/types-input";
    }


    @PostMapping(value = "/typessave")
    public String post(@Valid Type type, BindingResult result, RedirectAttributes attributes) {
        //如果新增过来的name值与数据库原有的name值相同
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1!=null){
            result.rejectValue("name","nameError","不能添加重复的分类");
        }
        //如果result有错误，返回到新增页面
        if (result.hasErrors()) {
            return "admin/types-input";
        }
        //执行新增操作
        Type t = typeService.saveType(type);
        if (t == null) {
            attributes.addFlashAttribute("message","添加失败！");
        } else {
            attributes.addFlashAttribute("message","添加成功！");
        }
        return "redirect:/admin/types";
    }


    @GetMapping(value = "/types/{id}/input")
    public String editInput(@PathVariable Long id, Model model) {
        model.addAttribute("type",typeService.getType(id));
        return "admin/types-input";
    }


    @PostMapping(value = "/typessave/{id}")
    public String editPost(@Valid Type type, BindingResult result,@PathVariable Long id, RedirectAttributes attributes) {
        //如果新增过来的name值与数据库原有的name值相同
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1!=null){
            result.rejectValue("name","nameError","不能添加重复的分类");
        }
        //如果result有错误，返回到新增页面
        if (result.hasErrors()) {
            return "admin/types-input";
        }
        //执行新增操作
        Type t = typeService.updateType(id,type);
        if (t == null) {
            attributes.addFlashAttribute("message","更新失败！");
        } else {
            attributes.addFlashAttribute("message","更新成功！");
        }
        return "redirect:/admin/types";
    }


    @GetMapping(value = "/types/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes) {
        typeService.deleteType(id);
        attributes.addFlashAttribute("message","删除成功！");
        return "redirect:/admin/types";
    }
}
